CVE-2026-54457 json
TensorZero: Arbitrary file read and SSRF in TensorZero Gateway's internal object storage endpoint
published 2026-07-15 3 mo ago modified 2026-10-14 25 d ago also GHSA-824w-x939-6cmc , PYSEC-2026-3541 , EUVD-2026-64144
- cvss
- 7.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
TensorZero is an open-source LLMOps platform that unifies an LLM gateway, observability, evaluation, optimization, and experimentation. Prior to 2026.6.0, the TensorZero Gateway /internal/object_storage endpoint accepts a caller-supplied JSON storage_path parameter that dynamically overrides the [object_storage] configuration. Selecting the filesystem storage type allows arbitrary files on the gateway filesystem to be read, including credential files. Selecting the s3_compatible storage type causes outbound object-storage requests to attacker-chosen internal or cloud-metadata endpoints. Exploitation requires access to the gateway, which can be authenticated or unauthenticated depending on deployment configuration. This issue is fixed in version 2026.6.0.
Patch / fix
- pypi tensorzero 2026.6.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| GitHub | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| OSV | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | tensorzero | <2026.6.0 |
2026.6.0 |
Affected products
- tensorzero tensorzero
Classification
References
-
github.com
/tensorzero/tensorzero/commit/0abbc838bae3394fe7491dad7009670d4e3b6cf8
web
-
github.com
/tensorzero/tensorzero/security/advisories/GHSA-824w-x939-6cmc
web
-
github.com
/tensorzero/tensorzero/releases/tag/2026.6.0
web
-
github.com
/tensorzero/tensorzero
package
-
pypi.org
/project/tensorzero
package
-
github.com
/advisories/GHSA-824w-x939-6cmc
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-54457
advisory
Sources
- CVE List CVE-2026-54457
- GitHub Advisory GHSA-824w-x939-6cmc
- NVD CVE-2026-54457
- OSV PYSEC-2026-3541
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.